12657231 has 12 divisors (see below), whose sum is σ = 19358352. Its totient is φ = 7941696.

The previous prime is 12657223. The next prime is 12657247. The reversal of 12657231 is 13275621.

It is a happy number.

12657231 is a `hidden beast` number, since 1 + 2 + 657 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 12657231 - 2³ = 12657223 is a prime.

It is a super-3 number, since 3×12657231³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12657195 and 12657204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41211 + ... + 41516.

It is an arithmetic number, because the mean of its divisors is an integer number (1613196).

Almost surely, 2^12657231 is an apocalyptic number.

12657231 is a deficient number, since it is larger than the sum of its proper divisors (6701121).

12657231 is a wasteful number, since it uses less digits than its factorization.

12657231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82750 (or 82747 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12657231 is about 3557.7002403238. The cubic root of 12657231 is about 233.0484589171.

The spelling of 12657231 in words is "twelve million, six hundred fifty-seven thousand, two hundred thirty-one".